Hi Lori,
I checked the plant, but I'm still pretty sure that mine is C. gigantea. The picture on ATP is from the young plant, so it looks smaller than it is now (over 200 cm). Besides that the plant is inbetween some strong growing plants, so it can't develop the way it should. What make me think it's indeed the C. gigantea is the color. The C. alpina is more withish than yellow.
I'm not a botanist, so I'm open for any other comments you have. Searching the internet gave me no real solution. English is not my mother language, so first I checked the Dutch pages about these plants. All the Dutch pages say the C. alpina is growing not higher than 150 cm, but some English pages speak about 250 cm. Do you know if there is a difference in the leaves? Or any other way to really identify the plant.
Kind regards,
Jonna
